import re import textwrap from django.utils.translation import ugettext_lazy as _ from orchestra.contrib.orchestration import ServiceController from orchestra.contrib.orchestration.models import BackendOperation as Operation from . import settings class Bind9MasterDomainBackend(ServiceController): verbose_name = _("Bind9 master domain") model = 'domains.Domain' related_models = ( ('domains.Record', 'domain__origin'), ('domains.Domain', 'origin'), ) ignore_fields = ['serial'] @classmethod def is_main(cls, obj): """ work around Domain.top self relationship """ if super(Bind9MasterDomainBackend, cls).is_main(obj): return not obj.top def save(self, domain): context = self.get_context(domain) domain.refresh_serial() context['zone'] = ';; %(banner)s\n' % context context['zone'] += domain.render_zone() self.append(textwrap.dedent("""\ echo -e '%(zone)s' > %(zone_path)s.tmp diff -N -I'^\s*;;' %(zone_path)s %(zone_path)s.tmp || UPDATED=1 # Because bind reload will not display any fucking error named-checkzone -k fail -n fail %(name)s %(zone_path)s.tmp mv %(zone_path)s.tmp %(zone_path)s """) % context ) self.update_conf(context) def update_conf(self, context): self.append(textwrap.dedent("""\ sed '/zone "%(name)s".*/,/^\s*};\s*$/!d' %(conf_path)s | diff -B -I"^\s*//" - <(echo '%(conf)s') || { sed -i -e '/zone\s\s*"%(name)s".*/,/^\s*};/d' \\ -e 'N; /^\s*\\n\s*$/d; P; D' %(conf_path)s echo '%(conf)s' >> %(conf_path)s UPDATED=1 }""") % context ) # Delete ex-top-domains that are now subdomains self.append(textwrap.dedent("""\ sed -i -e '/zone\s\s*".*\.%(name)s".*/,/^\s*};\s*$/d' \\ -e 'N; /^\s*\\n\s*$/d; P; D' %(conf_path)s""") % context ) if 'zone_path' in context: context['zone_subdomains_path'] = re.sub(r'^(.*/)', r'\1*.', context['zone_path']) self.append('rm -f %(zone_subdomains_path)s' % context) def delete(self, domain): context = self.get_context(domain) self.append('rm -f %(zone_path)s;' % context) self.delete_conf(context) def delete_conf(self, context): if context['name'][0] in ('*', '_'): # These can never be top level domains return self.append(textwrap.dedent("""\ sed -e '/zone\s\s*"%(name)s".*/,/^\s*};\s*$/d' \\ -e 'N; /^\s*\\n\s*$/d; P; D' %(conf_path)s > %(conf_path)s.tmp""") % context ) self.append('diff -B -I"^\s*//" %(conf_path)s.tmp %(conf_path)s || UPDATED=1' % context) self.append('mv %(conf_path)s.tmp %(conf_path)s' % context) def commit(self): """ reload bind if needed """ self.append('if [[ $UPDATED == 1 ]]; then service bind9 reload; fi') def get_servers(self, domain, backend): """ Get related server IPs from registered backend routes """ from orchestra.contrib.orchestration.manager import router operation = Operation.create(backend, domain, Operation.SAVE) servers = [] for server in router.get_servers(operation): servers.append(server.get_ip()) return servers def get_slaves(self, domain): return self.get_servers(domain, Bind9SlaveDomainBackend) def get_context(self, domain): slaves = self.get_slaves(domain) context = { 'name': domain.name, 'zone_path': settings.DOMAINS_ZONE_PATH % {'name': domain.name}, 'subdomains': domain.subdomains.all(), 'banner': self.get_banner(), 'slaves': '; '.join(slaves) or 'none', 'also_notify': '; '.join(slaves) + ';' if slaves else '', } context.update({ 'conf_path': settings.DOMAINS_MASTERS_PATH, 'conf': textwrap.dedent(""" zone "%(name)s" { // %(banner)s type master; file "%(zone_path)s"; allow-transfer { %(slaves)s; }; also-notify { %(also_notify)s }; notify yes; };""") % context }) return context class Bind9SlaveDomainBackend(Bind9MasterDomainBackend): verbose_name = _("Bind9 slave domain") related_models = ( ('domains.Domain', 'origin'), ) def save(self, domain): context = self.get_context(domain) self.update_conf(context) def delete(self, domain): context = self.get_context(domain) self.delete_conf(context) def commit(self): """ ideally slave should be restarted after master """ self.append('if [[ $UPDATED == 1 ]]; then { sleep 1 && service bind9 reload; } & fi') def get_masters(self, domain): return self.get_servers(domain, Bind9MasterDomainBackend) def get_context(self, domain): context = { 'name': domain.name, 'banner': self.get_banner(), 'subdomains': domain.subdomains.all(), 'masters': '; '.join(self.get_masters(domain)) or 'none', } context.update({ 'conf_path': settings.DOMAINS_SLAVES_PATH, 'conf': textwrap.dedent(""" zone "%(name)s" { // %(banner)s type slave; file "%(name)s"; masters { %(masters)s; }; allow-notify { %(masters)s; }; };""") % context }) return context